Engineer - Backend

We're looking for a Software Engineer with deep expertise in backend to help develop the next-generation AI platform for market due diligence. You'll architect the AI-powered engine that orchestrates autonomous research agents and voice AI pipelines to create the next-generation of market reports for investment professionals in Private Equity, Hedge Funds, Private Credit, and Corporate M&A.

About Diligence. Squared Diligence. Squared is the AI-native consulting firm. We deliver investment-grade market research and commercial due diligence, powered by AI agents and led by experienced consultants. Our founding team brings deep experience from Blackstone and BCG, and we're backed by Y Combinator and Relentless.

Our clients include 5 of the 10 largest private equity firms in the world and represent more than $3T in combined AUM.

What you will do

• Build new product features and experiences end-to-end, everything from database models to API endpoints, and integrating them with UI components for our web and AI Voice Agent Application
• Design and build new AI-powered modules from scratch (e.g., market sizing, competitive analysis) that become core capabilities of our research platform
• Build and own product foundations (AI agent orchestration, voice AI pipelines, app and API performance, intelligent automations)
• Architect scalable backend services with complex async processing and background task orchestration
• Apply learnings from each project into the product, so we're 1% better everyday (Law of Compounding is real. After all, we are founded by investment professionals) Qualifications: - 3+ years of professional Python backend experience
• Strong expertise building production APIs (FastAPI, Django, or similar)
• Experience building agentic systems with LLM platforms (Anthropic, OpenAI, or similar)
• Deep hands-on experience with LLMs in production - building reliable agentic systems, not just API calls
• Experience with PostgreSQL and SQL database design
• Understanding of async programming, job queues, and distributed systems
• Experience with background task orchestration and async processing workflows Bonus:
• Experience with Anthropic Claude API and Agent SDK
• Familiarity with agent orchestration frameworks
• Background in AI/ML systems or voice AI
• Familiarity with vector databases and semantic search (pg_vector, etc.)
• Experience with Supabase or similar Backend-as-a-Service platforms
• Previous startup experience Who you are:
• Obsess over system design and think deeply about technical trade-offs
• Take pride in your code and want to work with others who do the same
• Act with Urgency so we can empower you with Agency
• Pay high attention to detail and are curious about how great products work
• Feel discomfort when things don't move as fast as you feel they should